A very greedy and disagreeable usurer has been killed in his office while his accountant and the office worker were outside the office for some duties.When they came back Erich Winterhammer discovered the corpse of Mr. Minsch and called the police.At the beginning of the investigation Derrick and Klein are interested in this shy and uncomfortable accountant and his colleague the young girl.Then they observe that both are lovers and live together, Erich intends to help Hilde in her new life.The widow of the usurer doesn't feel sorrow for the death of her husband.Derrick and Klein vistit the widow in the night and they find a great feast and a very arrogant widow.
So begins now the real investigation about the widow, her mother, her lover and others friends.
Tod des Wucheres is a very interesting episode for the description of rich and arrogant people on one side and of shy and fearful people on the other side.
The performance of Peter Kuiper as the greedy Mr. Minsch is remarkable and also the performance of Gerd Baltus as Erich Winterhammer is remarkable.